(a) Enter an equation for the plane through the point $\left(-3,1,-3\right)$ and perpendicular to $\left<3,5,0\right>$.
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(b) Enter an equation for the line in the xy-plane with x-intercept $3$ and y-intercept $4$.
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(c) Enter an equation for the vertical line in the xy-plane through the point $(3,1)$.
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